Numbness in the face and hands when angry is usually due to the occurrence of hyperventilation syndrome. This is a very common clinical syndrome that is functional and does not cause organic damage to the body. Patients have a personality basis that is sensitive or easily influenced, and most have some degree of anxiety or depression. When angry, the patient will have hyperventilation, often because of the feeling of chest tightness, breathlessness, resulting in repeated gulping, excessive carbon dioxide out of the body, resulting in central and peripheral carbon dioxide concentration are excessively lowered, resulting in the production of the face as well as numbness in the hands and feet. The most obvious parts of numbness are generally around the mouth and the distal part of the limbs, and severe patients will also have limb stiffness, or even convulsions. A paper cup can be used to cover the nose and mouth, allowing the patient to breathe the exhaled carbon dioxide back into the body again, usually after a period of time, the symptoms can be gradually relieved.